Pipe holder



FIG. 1 is an isometrical view of a pipe holder showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a bottom view thereof.

The ornamental design for a pipe holder, as shown and described.